Mercurial > hg
annotate mercurial/vfs.py @ 50951:44c29568898f
debugfileset: migrate `opts` to native kwargs
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Mon, 21 Aug 2023 17:12:03 -0400 |
parents | 18c8c18993f0 |
children | 187c5769a629 |
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vfs: extract 'vfs' class and related code to a new 'vfs' module (API)
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1 # vfs.py - Mercurial 'vfs' classes |
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2 # |
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3 # Copyright Olivia Mackall <olivia@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import contextlib |
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9 import os |
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10 import shutil |
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11 import stat |
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12 import threading |
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13 |
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14 from typing import ( |
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15 Optional, |
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16 ) |
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17 |
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18 from .i18n import _ |
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19 from . import ( |
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20 encoding, |
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21 error, |
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22 pathutil, |
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23 pycompat, |
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24 util, |
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25 ) |
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26 |
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27 |
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28 def _avoidambig(path: bytes, oldstat): |
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29 """Avoid file stat ambiguity forcibly |
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30 |
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31 This function causes copying ``path`` file, if it is owned by |
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32 another (see issue5418 and issue5584 for detail). |
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33 """ |
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34 |
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35 def checkandavoid(): |
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36 newstat = util.filestat.frompath(path) |
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37 # return whether file stat ambiguity is (already) avoided |
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38 return not newstat.isambig(oldstat) or newstat.avoidambig(path, oldstat) |
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39 |
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40 if not checkandavoid(): |
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41 # simply copy to change owner of path to get privilege to |
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42 # advance mtime (see issue5418) |
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43 util.rename(util.mktempcopy(path), path) |
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44 checkandavoid() |
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45 |
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46 |
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47 class abstractvfs: |
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48 """Abstract base class; cannot be instantiated""" |
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49 |
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50 # default directory separator for vfs |
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51 # |
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52 # Other vfs code always use `/` and this works fine because python file API |
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53 # abstract the use of `/` and make it work transparently. For consistency |
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54 # vfs will always use `/` when joining. This avoid some confusion in |
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55 # encoded vfs (see issue6546) |
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56 _dir_sep = b'/' |
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57 |
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58 def __init__(self, *args, **kwargs): |
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59 '''Prevent instantiation; don't call this from subclasses.''' |
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60 raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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61 |
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62 # TODO: type return, which is util.posixfile wrapped by a proxy |
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63 def __call__(self, path: bytes, mode: bytes = b'rb', **kwargs): |
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64 raise NotImplementedError |
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65 |
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66 def _auditpath(self, path: bytes, mode: bytes): |
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67 raise NotImplementedError |
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68 |
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69 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
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70 raise NotImplementedError |
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71 |
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72 def tryread(self, path: bytes) -> bytes: |
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73 '''gracefully return an empty string for missing files''' |
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74 try: |
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75 return self.read(path) |
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76 except FileNotFoundError: |
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77 pass |
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78 return b"" |
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79 |
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80 def tryreadlines(self, path: bytes, mode: bytes = b'rb'): |
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81 '''gracefully return an empty array for missing files''' |
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82 try: |
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83 return self.readlines(path, mode=mode) |
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84 except FileNotFoundError: |
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85 pass |
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86 return [] |
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87 |
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88 @util.propertycache |
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89 def open(self): |
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90 """Open ``path`` file, which is relative to vfs root. |
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91 |
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92 Newly created directories are marked as "not to be indexed by |
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93 the content indexing service", if ``notindexed`` is specified |
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94 for "write" mode access. |
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95 """ |
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96 return self.__call__ |
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97 |
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98 def read(self, path: bytes) -> bytes: |
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99 with self(path, b'rb') as fp: |
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100 return fp.read() |
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101 |
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102 def readlines(self, path: bytes, mode: bytes = b'rb'): |
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103 with self(path, mode=mode) as fp: |
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104 return fp.readlines() |
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105 |
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106 def write( |
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107 self, path: bytes, data: bytes, backgroundclose=False, **kwargs |
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108 ) -> int: |
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109 with self(path, b'wb', backgroundclose=backgroundclose, **kwargs) as fp: |
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110 return fp.write(data) |
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111 |
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112 def writelines( |
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113 self, path: bytes, data: bytes, mode: bytes = b'wb', notindexed=False |
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114 ) -> None: |
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115 with self(path, mode=mode, notindexed=notindexed) as fp: |
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116 return fp.writelines(data) |
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117 |
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118 def append(self, path: bytes, data: bytes) -> int: |
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119 with self(path, b'ab') as fp: |
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120 return fp.write(data) |
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121 |
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122 def basename(self, path: bytes) -> bytes: |
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123 """return base element of a path (as os.path.basename would do) |
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124 |
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125 This exists to allow handling of strange encoding if needed.""" |
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126 return os.path.basename(path) |
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127 |
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128 def chmod(self, path: bytes, mode: int) -> None: |
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129 return os.chmod(self.join(path), mode) |
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130 |
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131 def dirname(self, path: bytes) -> bytes: |
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132 """return dirname element of a path (as os.path.dirname would do) |
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133 |
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134 This exists to allow handling of strange encoding if needed.""" |
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135 return os.path.dirname(path) |
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136 |
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137 def exists(self, path: Optional[bytes] = None) -> bool: |
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138 return os.path.exists(self.join(path)) |
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139 |
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140 def fstat(self, fp): |
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141 return util.fstat(fp) |
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142 |
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143 def isdir(self, path: Optional[bytes] = None) -> bool: |
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144 return os.path.isdir(self.join(path)) |
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145 |
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146 def isfile(self, path: Optional[bytes] = None) -> bool: |
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147 return os.path.isfile(self.join(path)) |
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148 |
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149 def islink(self, path: Optional[bytes] = None) -> bool: |
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150 return os.path.islink(self.join(path)) |
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151 |
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152 def isfileorlink(self, path: Optional[bytes] = None) -> bool: |
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153 """return whether path is a regular file or a symlink |
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154 |
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155 Unlike isfile, this doesn't follow symlinks.""" |
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156 try: |
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157 st = self.lstat(path) |
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158 except OSError: |
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159 return False |
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160 mode = st.st_mode |
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161 return stat.S_ISREG(mode) or stat.S_ISLNK(mode) |
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162 |
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163 def _join(self, *paths: bytes) -> bytes: |
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164 root_idx = 0 |
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165 for idx, p in enumerate(paths): |
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166 if os.path.isabs(p) or p.startswith(self._dir_sep): |
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167 root_idx = idx |
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168 if root_idx != 0: |
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169 paths = paths[root_idx:] |
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170 paths = [p for p in paths if p] |
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171 return self._dir_sep.join(paths) |
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172 |
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173 def reljoin(self, *paths: bytes) -> bytes: |
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174 """join various elements of a path together (as os.path.join would do) |
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175 |
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176 The vfs base is not injected so that path stay relative. This exists |
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177 to allow handling of strange encoding if needed.""" |
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178 return self._join(*paths) |
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179 |
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180 def split(self, path: bytes): |
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181 """split top-most element of a path (as os.path.split would do) |
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182 |
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183 This exists to allow handling of strange encoding if needed.""" |
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184 return os.path.split(path) |
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185 |
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186 def lexists(self, path: Optional[bytes] = None) -> bool: |
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187 return os.path.lexists(self.join(path)) |
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188 |
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189 def lstat(self, path: Optional[bytes] = None): |
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190 return os.lstat(self.join(path)) |
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191 |
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192 def listdir(self, path: Optional[bytes] = None): |
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193 return os.listdir(self.join(path)) |
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194 |
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195 def makedir(self, path: Optional[bytes] = None, notindexed=True): |
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196 return util.makedir(self.join(path), notindexed) |
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197 |
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198 def makedirs( |
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199 self, path: Optional[bytes] = None, mode: Optional[int] = None |
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200 ): |
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201 return util.makedirs(self.join(path), mode) |
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202 |
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203 def makelock(self, info, path: bytes): |
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204 return util.makelock(info, self.join(path)) |
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205 |
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206 def mkdir(self, path: Optional[bytes] = None): |
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207 return os.mkdir(self.join(path)) |
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208 |
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209 def mkstemp( |
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210 self, |
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211 suffix: bytes = b'', |
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212 prefix: bytes = b'tmp', |
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213 dir: Optional[bytes] = None, |
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214 ): |
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215 fd, name = pycompat.mkstemp( |
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216 suffix=suffix, prefix=prefix, dir=self.join(dir) |
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217 ) |
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218 dname, fname = util.split(name) |
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219 if dir: |
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220 return fd, os.path.join(dir, fname) |
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221 else: |
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222 return fd, fname |
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223 |
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224 def readdir(self, path: Optional[bytes] = None, stat=None, skip=None): |
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225 return util.listdir(self.join(path), stat, skip) |
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226 |
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227 def readlock(self, path: bytes) -> bytes: |
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228 return util.readlock(self.join(path)) |
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229 |
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230 def rename(self, src: bytes, dst: bytes, checkambig=False): |
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231 """Rename from src to dst |
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232 |
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233 checkambig argument is used with util.filestat, and is useful |
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234 only if destination file is guarded by any lock |
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235 (e.g. repo.lock or repo.wlock). |
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236 |
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237 To avoid file stat ambiguity forcibly, checkambig=True involves |
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238 copying ``src`` file, if it is owned by another. Therefore, use |
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239 checkambig=True only in limited cases (see also issue5418 and |
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240 issue5584 for detail). |
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241 """ |
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242 self._auditpath(dst, b'w') |
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243 srcpath = self.join(src) |
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244 dstpath = self.join(dst) |
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245 oldstat = checkambig and util.filestat.frompath(dstpath) |
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246 if oldstat and oldstat.stat: |
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247 ret = util.rename(srcpath, dstpath) |
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248 _avoidambig(dstpath, oldstat) |
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249 return ret |
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250 return util.rename(srcpath, dstpath) |
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251 |
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252 def readlink(self, path: bytes) -> bytes: |
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253 return util.readlink(self.join(path)) |
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254 |
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255 def removedirs(self, path: Optional[bytes] = None): |
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256 """Remove a leaf directory and all empty intermediate ones""" |
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257 return util.removedirs(self.join(path)) |
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258 |
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259 def rmdir(self, path: Optional[bytes] = None): |
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260 """Remove an empty directory.""" |
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261 return os.rmdir(self.join(path)) |
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262 |
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263 def rmtree( |
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264 self, path: Optional[bytes] = None, ignore_errors=False, forcibly=False |
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265 ): |
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266 """Remove a directory tree recursively |
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267 |
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268 If ``forcibly``, this tries to remove READ-ONLY files, too. |
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269 """ |
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270 if forcibly: |
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271 |
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272 def onexc(function, path, excinfo): |
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273 if function is not os.remove: |
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274 raise |
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275 # read-only files cannot be unlinked under Windows |
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276 s = os.stat(path) |
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277 if (s.st_mode & stat.S_IWRITE) != 0: |
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278 raise |
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279 os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE) |
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280 os.remove(path) |
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281 |
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282 else: |
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283 onexc = None |
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284 try: |
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285 # pytype: disable=wrong-keyword-args |
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286 return shutil.rmtree( |
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287 self.join(path), ignore_errors=ignore_errors, onexc=onexc |
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288 ) |
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289 # pytype: enable=wrong-keyword-args |
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290 except TypeError: # onexc was introduced in Python 3.12 |
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291 return shutil.rmtree( |
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292 self.join(path), ignore_errors=ignore_errors, onerror=onexc |
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293 ) |
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294 |
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295 def setflags(self, path: bytes, l: bool, x: bool): |
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296 return util.setflags(self.join(path), l, x) |
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297 |
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298 def stat(self, path: Optional[bytes] = None): |
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299 return os.stat(self.join(path)) |
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300 |
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301 def unlink(self, path: Optional[bytes] = None): |
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302 return util.unlink(self.join(path)) |
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303 |
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304 def tryunlink(self, path: Optional[bytes] = None): |
31542 | 305 """Attempt to remove a file, ignoring missing file errors.""" |
306 util.tryunlink(self.join(path)) | |
307 | |
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308 def unlinkpath( |
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309 self, path: Optional[bytes] = None, ignoremissing=False, rmdir=True |
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310 ): |
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311 return util.unlinkpath( |
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312 self.join(path), ignoremissing=ignoremissing, rmdir=rmdir |
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313 ) |
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314 |
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315 def utime(self, path: Optional[bytes] = None, t=None): |
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316 return os.utime(self.join(path), t) |
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317 |
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318 def walk(self, path: Optional[bytes] = None, onerror=None): |
24725 | 319 """Yield (dirpath, dirs, files) tuple for each directories under path |
320 | |
321 ``dirpath`` is relative one from the root of this vfs. This | |
322 uses ``os.sep`` as path separator, even you specify POSIX | |
323 style ``path``. | |
324 | |
325 "The root of this vfs" is represented as empty ``dirpath``. | |
326 """ | |
327 root = os.path.normpath(self.join(None)) | |
328 # when dirpath == root, dirpath[prefixlen:] becomes empty | |
329 # because len(dirpath) < prefixlen. | |
330 prefixlen = len(pathutil.normasprefix(root)) | |
331 for dirpath, dirs, files in os.walk(self.join(path), onerror=onerror): | |
332 yield (dirpath[prefixlen:], dirs, files) | |
333 | |
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334 @contextlib.contextmanager |
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335 def backgroundclosing(self, ui, expectedcount=-1): |
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336 """Allow files to be closed asynchronously. |
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337 |
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338 When this context manager is active, ``backgroundclose`` can be passed |
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339 to ``__call__``/``open`` to result in the file possibly being closed |
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340 asynchronously, on a background thread. |
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341 """ |
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342 # Sharing backgroundfilecloser between threads is complex and using |
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343 # multiple instances puts us at risk of running out of file descriptors |
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344 # only allow to use backgroundfilecloser when in main thread. |
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345 if not isinstance( |
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346 threading.current_thread(), |
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347 threading._MainThread, # pytype: disable=module-attr |
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348 ): |
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349 yield |
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350 return |
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351 vfs = getattr(self, 'vfs', self) |
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352 if getattr(vfs, '_backgroundfilecloser', None): |
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353 raise error.Abort( |
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354 _(b'can only have 1 active background file closer') |
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355 ) |
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356 |
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357 with backgroundfilecloser(ui, expectedcount=expectedcount) as bfc: |
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358 try: |
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359 vfs._backgroundfilecloser = ( |
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360 bfc # pytype: disable=attribute-error |
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361 ) |
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362 yield bfc |
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363 finally: |
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364 vfs._backgroundfilecloser = ( |
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365 None # pytype: disable=attribute-error |
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366 ) |
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367 |
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368 def register_file(self, path): |
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369 """generic hook point to lets fncache steer its stew""" |
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370 |
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371 |
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372 class vfs(abstractvfs): |
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373 """Operate files relative to a base directory |
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374 |
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375 This class is used to hide the details of COW semantics and |
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376 remote file access from higher level code. |
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377 |
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378 'cacheaudited' should be enabled only if (a) vfs object is short-lived, or |
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379 (b) the base directory is managed by hg and considered sort-of append-only. |
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380 See pathutil.pathauditor() for details. |
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381 """ |
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382 |
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383 def __init__( |
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384 self, |
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385 base: bytes, |
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386 audit=True, |
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387 cacheaudited=False, |
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388 expandpath=False, |
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389 realpath=False, |
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390 ): |
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391 if expandpath: |
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392 base = util.expandpath(base) |
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393 if realpath: |
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394 base = os.path.realpath(base) |
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395 self.base = base |
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396 self._audit = audit |
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397 if audit: |
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398 self.audit = pathutil.pathauditor(self.base, cached=cacheaudited) |
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399 else: |
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400 self.audit = lambda path, mode=None: True |
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401 self.createmode = None |
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402 self._trustnlink = None |
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403 self.options = {} |
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404 |
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405 @util.propertycache |
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406 def _cansymlink(self) -> bool: |
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407 return util.checklink(self.base) |
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408 |
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409 @util.propertycache |
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410 def _chmod(self): |
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411 return util.checkexec(self.base) |
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412 |
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413 def _fixfilemode(self, name): |
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414 if self.createmode is None or not self._chmod: |
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415 return |
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416 os.chmod(name, self.createmode & 0o666) |
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417 |
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418 def _auditpath(self, path, mode) -> None: |
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419 if self._audit: |
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420 if os.path.isabs(path) and path.startswith(self.base): |
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421 path = os.path.relpath(path, self.base) |
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422 r = util.checkosfilename(path) |
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423 if r: |
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424 raise error.Abort(b"%s: %r" % (r, path)) |
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425 self.audit(path, mode=mode) |
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426 |
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427 def isfileorlink_checkdir( |
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428 self, dircache, path: Optional[bytes] = None |
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429 ) -> bool: |
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430 """return True if the path is a regular file or a symlink and |
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431 the directories along the path are "normal", that is |
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432 not symlinks or nested hg repositories. |
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433 |
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434 Ignores the `_audit` setting, and checks the directories regardless. |
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435 `dircache` is used to cache the directory checks. |
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436 """ |
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437 try: |
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438 for prefix in pathutil.finddirs_rev_noroot(util.localpath(path)): |
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439 if prefix in dircache: |
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440 res = dircache[prefix] |
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441 else: |
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442 res = pathutil.pathauditor._checkfs_exists( |
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443 self.base, prefix, path |
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444 ) |
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445 dircache[prefix] = res |
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446 if not res: |
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447 return False |
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448 except (OSError, error.Abort): |
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449 return False |
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450 return self.isfileorlink(path) |
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451 |
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452 def __call__( |
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453 self, |
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454 path: bytes, |
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455 mode: bytes = b"rb", |
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456 atomictemp=False, |
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457 notindexed=False, |
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458 backgroundclose=False, |
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459 checkambig=False, |
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460 auditpath=True, |
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461 makeparentdirs=True, |
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462 ): |
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463 """Open ``path`` file, which is relative to vfs root. |
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464 |
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465 By default, parent directories are created as needed. Newly created |
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466 directories are marked as "not to be indexed by the content indexing |
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467 service", if ``notindexed`` is specified for "write" mode access. |
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468 Set ``makeparentdirs=False`` to not create directories implicitly. |
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469 |
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470 If ``backgroundclose`` is passed, the file may be closed asynchronously. |
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471 It can only be used if the ``self.backgroundclosing()`` context manager |
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472 is active. This should only be specified if the following criteria hold: |
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473 |
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474 1. There is a potential for writing thousands of files. Unless you |
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475 are writing thousands of files, the performance benefits of |
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476 asynchronously closing files is not realized. |
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477 2. Files are opened exactly once for the ``backgroundclosing`` |
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478 active duration and are therefore free of race conditions between |
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479 closing a file on a background thread and reopening it. (If the |
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480 file were opened multiple times, there could be unflushed data |
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481 because the original file handle hasn't been flushed/closed yet.) |
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482 |
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483 ``checkambig`` argument is passed to atomictempfile (valid |
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484 only for writing), and is useful only if target file is |
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485 guarded by any lock (e.g. repo.lock or repo.wlock). |
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486 |
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487 To avoid file stat ambiguity forcibly, checkambig=True involves |
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488 copying ``path`` file opened in "append" mode (e.g. for |
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489 truncation), if it is owned by another. Therefore, use |
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490 combination of append mode and checkambig=True only in limited |
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491 cases (see also issue5418 and issue5584 for detail). |
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492 """ |
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493 if auditpath: |
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494 self._auditpath(path, mode) |
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495 f = self.join(path) |
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496 |
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497 if b"b" not in mode: |
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498 mode += b"b" # for that other OS |
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499 |
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500 nlink = -1 |
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501 if mode not in (b'r', b'rb'): |
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502 dirname, basename = util.split(f) |
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503 # If basename is empty, then the path is malformed because it points |
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504 # to a directory. Let the posixfile() call below raise IOError. |
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505 if basename: |
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506 if atomictemp: |
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507 if makeparentdirs: |
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508 util.makedirs(dirname, self.createmode, notindexed) |
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509 return util.atomictempfile( |
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510 f, mode, self.createmode, checkambig=checkambig |
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511 ) |
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512 try: |
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513 if b'w' in mode: |
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514 util.unlink(f) |
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515 nlink = 0 |
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516 else: |
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517 # nlinks() may behave differently for files on Windows |
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518 # shares if the file is open. |
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519 with util.posixfile(f): |
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520 nlink = util.nlinks(f) |
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521 if nlink < 1: |
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522 nlink = 2 # force mktempcopy (issue1922) |
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523 except FileNotFoundError: |
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524 nlink = 0 |
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525 if makeparentdirs: |
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526 util.makedirs(dirname, self.createmode, notindexed) |
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527 if nlink > 0: |
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528 if self._trustnlink is None: |
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529 self._trustnlink = nlink > 1 or util.checknlink(f) |
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530 if nlink > 1 or not self._trustnlink: |
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531 util.rename(util.mktempcopy(f), f) |
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532 fp = util.posixfile(f, mode) |
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533 if nlink == 0: |
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534 self._fixfilemode(f) |
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535 |
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536 if checkambig: |
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537 if mode in (b'r', b'rb'): |
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538 raise error.Abort( |
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539 _( |
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540 b'implementation error: mode %s is not' |
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541 b' valid for checkambig=True' |
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542 ) |
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543 % mode |
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544 ) |
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545 fp = checkambigatclosing(fp) |
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546 |
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547 if backgroundclose and isinstance( |
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548 threading.current_thread(), |
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549 threading._MainThread, # pytype: disable=module-attr |
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550 ): |
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551 if ( |
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552 not self._backgroundfilecloser # pytype: disable=attribute-error |
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553 ): |
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554 raise error.Abort( |
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555 _( |
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556 b'backgroundclose can only be used when a ' |
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557 b'backgroundclosing context manager is active' |
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558 ) |
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|
559 ) |
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560 |
43484
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Augie Fackler <augie@google.com>
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561 fp = delayclosedfile( |
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562 fp, |
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vfs: more attribute suppressions
Augie Fackler <augie@google.com>
parents:
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563 self._backgroundfilecloser, # pytype: disable=attribute-error |
da9ecbb10368
vfs: more attribute suppressions
Augie Fackler <augie@google.com>
parents:
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|
564 ) |
27895
2d6a89e79b48
scmutil: support background file closing
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
565 |
13970
d13913355390
move opener from util to scmutil
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parents:
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diff
changeset
|
566 return fp |
d13913355390
move opener from util to scmutil
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parents:
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diff
changeset
|
567 |
49573
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typing: add basic type hints to vfs.py
Matt Harbison <matt_harbison@yahoo.com>
parents:
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diff
changeset
|
568 def symlink(self, src: bytes, dst: bytes) -> None: |
18327
4aecdb91443c
scmutil: simplify vfs.audit - drop wrapped vfs.auditor
Mads Kiilerich <mads@kiilerich.com>
parents:
18316
diff
changeset
|
569 self.audit(dst) |
16199
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scmutil: add join method to opener to construct path relative to base
Idan Kamara <idankk86@gmail.com>
parents:
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diff
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|
570 linkname = self.join(dst) |
31549 | 571 util.tryunlink(linkname) |
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parents:
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diff
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|
572 |
29017
07be86828e79
util: fix race in makedirs()
Adam Simpkins <simpkins@fb.com>
parents:
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changeset
|
573 util.makedirs(os.path.dirname(linkname), self.createmode) |
13970
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parents:
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diff
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574 |
14261
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opener: rename _can_symlink to _cansymlink
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parents:
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diff
changeset
|
575 if self._cansymlink: |
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576 try: |
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|
577 os.symlink(src, linkname) |
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parents:
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|
578 except OSError as err: |
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579 raise OSError( |
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580 err.errno, |
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581 _(b'could not symlink to %r: %s') |
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582 % (src, encoding.strtolocal(err.strerror)), |
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|
583 linkname, |
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584 ) |
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diff
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|
585 else: |
17768
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vfs: use self.write to write symlink placeholders
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
586 self.write(dst, src) |
13971
bfeaa88b875d
move canonpath from util to scmutil
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parents:
13970
diff
changeset
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587 |
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parents:
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diff
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|
588 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
17161
be016e96117a
localrepo: use file API via vfs while ensuring repository directory
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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diff
changeset
|
589 if path: |
47809
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vfs: always use / as file separator (issue6546)
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47443
diff
changeset
|
590 parts = [self.base, path] |
98c3fa6a3ac2
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
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|
591 parts.extend(insidef) |
98c3fa6a3ac2
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
47443
diff
changeset
|
592 return self._join(*parts) |
17681
a41fd730f230
scmutil: backout 83785bb56062 (issue3643)
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
593 else: |
a41fd730f230
scmutil: backout 83785bb56062 (issue3643)
Matt Mackall <mpm@selenic.com>
parents:
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|
594 return self.base |
16199
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|
595 |
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596 |
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parents:
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diff
changeset
|
597 opener = vfs |
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598 |
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599 |
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parents:
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diff
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|
600 class proxyvfs(abstractvfs): |
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|
601 def __init__(self, vfs: "vfs"): |
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Bryan O'Sullivan <bryano@fb.com>
parents:
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602 self.vfs = vfs |
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parents:
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diff
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|
603 |
50365
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parents:
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diff
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|
604 @property |
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|
605 def createmode(self): |
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|
606 return self.vfs.createmode |
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
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|
607 |
41094
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vfs: handle _auditpath in proxyvfs
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diff
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|
608 def _auditpath(self, path, mode): |
adee334d94cd
vfs: handle _auditpath in proxyvfs
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609 return self.vfs._auditpath(path, mode) |
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|
610 |
27879
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cleanup: use modern @property/@foo.setter property specification
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parents:
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diff
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|
611 @property |
29714
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auditvfs: forward options property from nested vfs
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|
612 def options(self): |
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|
613 return self.vfs.options |
69109052d9ac
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|
614 |
69109052d9ac
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|
615 @options.setter |
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|
616 def options(self, value): |
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|
617 self.vfs.options = value |
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618 |
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619 |
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|
620 class filtervfs(proxyvfs, abstractvfs): |
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|
621 '''Wrapper vfs for filtering filenames with a function.''' |
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|
622 |
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|
623 def __init__(self, vfs: "vfs", filter): |
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|
624 proxyvfs.__init__(self, vfs) |
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|
625 self._filter = filter |
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diff
changeset
|
626 |
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changeset
|
627 def __call__(self, path: bytes, *args, **kwargs): |
17846
f42cf30873dc
scmutil: add mustaudit delegation to filtervfs (issue3673)
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parents:
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diff
changeset
|
628 return self.vfs(self._filter(path), *args, **kwargs) |
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diff
changeset
|
629 |
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changeset
|
630 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
17725
ffd589d4b785
vfs: define "join()" in each classes derived from "abstractvfs"
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parents:
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diff
changeset
|
631 if path: |
24628
a0b47885a1c5
vfs: make it possible to pass multiple path elements to join
Matt Harbison <matt_harbison@yahoo.com>
parents:
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diff
changeset
|
632 return self.vfs.join(self._filter(self.vfs.reljoin(path, *insidef))) |
17725
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vfs: define "join()" in each classes derived from "abstractvfs"
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diff
changeset
|
633 else: |
17846
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scmutil: add mustaudit delegation to filtervfs (issue3673)
Bryan O'Sullivan <bryano@fb.com>
parents:
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diff
changeset
|
634 return self.vfs.join(path) |
17725
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|
635 |
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|
636 |
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diff
changeset
|
637 filteropener = filtervfs |
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|
638 |
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|
639 |
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parents:
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diff
changeset
|
640 class readonlyvfs(proxyvfs): |
18213
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parents:
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diff
changeset
|
641 '''Wrapper vfs preventing any writing.''' |
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|
642 |
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|
643 def __init__(self, vfs: "vfs"): |
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|
644 proxyvfs.__init__(self, vfs) |
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diff
changeset
|
645 |
49574
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vfs: make the default opener mode binary
Matt Harbison <matt_harbison@yahoo.com>
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changeset
|
646 def __call__(self, path: bytes, mode: bytes = b'rb', *args, **kw): |
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|
647 if mode not in (b'r', b'rb'): |
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|
648 raise error.Abort(_(b'this vfs is read only')) |
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diff
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|
649 return self.vfs(path, mode, *args, **kw) |
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diff
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|
650 |
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changeset
|
651 def join(self, path: Optional[bytes], *insidef: bytes) -> bytes: |
26156
a112fffdb632
scmutil.readonlyvfs: implement join
Siddharth Agarwal <sid0@fb.com>
parents:
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diff
changeset
|
652 return self.vfs.join(path, *insidef) |
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|
653 |
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|
654 |
48946
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py3: use class X: instead of class X(object):
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changeset
|
655 class closewrapbase: |
29994
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diff
changeset
|
656 """Base class of wrapper, which hooks closing |
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|
657 |
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|
658 Do not instantiate outside of the vfs layer. |
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|
659 """ |
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660 |
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|
661 def __init__(self, fh): |
43506
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parents:
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changeset
|
662 object.__setattr__(self, '_origfh', fh) |
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|
663 |
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changeset
|
664 def __getattr__(self, attr): |
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|
665 return getattr(self._origfh, attr) |
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|
666 |
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changeset
|
667 def __setattr__(self, attr, value): |
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|
668 return setattr(self._origfh, attr, value) |
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changeset
|
669 |
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changeset
|
670 def __delattr__(self, attr): |
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671 return delattr(self._origfh, attr) |
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672 |
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673 def __enter__(self): |
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674 self._origfh.__enter__() |
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675 return self |
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676 |
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677 def __exit__(self, exc_type, exc_value, exc_tb): |
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678 raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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679 |
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680 def close(self): |
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681 raise NotImplementedError('attempted instantiating ' + str(type(self))) |
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682 |
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683 |
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684 class delayclosedfile(closewrapbase): |
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685 """Proxy for a file object whose close is delayed. |
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686 |
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687 Do not instantiate outside of the vfs layer. |
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688 """ |
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689 |
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690 def __init__(self, fh, closer): |
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691 super(delayclosedfile, self).__init__(fh) |
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692 object.__setattr__(self, '_closer', closer) |
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693 |
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694 def __exit__(self, exc_type, exc_value, exc_tb): |
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695 self._closer.close(self._origfh) |
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696 |
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697 def close(self): |
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698 self._closer.close(self._origfh) |
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699 |
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700 |
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701 class backgroundfilecloser: |
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702 """Coordinates background closing of file handles on multiple threads.""" |
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703 |
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704 def __init__(self, ui, expectedcount=-1): |
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705 self._running = False |
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706 self._entered = False |
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707 self._threads = [] |
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708 self._threadexception = None |
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709 |
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710 # Only Windows/NTFS has slow file closing. So only enable by default |
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711 # on that platform. But allow to be enabled elsewhere for testing. |
34645 | 712 defaultenabled = pycompat.iswindows |
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713 enabled = ui.configbool(b'worker', b'backgroundclose', defaultenabled) |
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714 |
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715 if not enabled: |
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716 return |
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717 |
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718 # There is overhead to starting and stopping the background threads. |
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719 # Don't do background processing unless the file count is large enough |
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720 # to justify it. |
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721 minfilecount = ui.configint(b'worker', b'backgroundcloseminfilecount') |
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722 # FUTURE dynamically start background threads after minfilecount closes. |
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723 # (We don't currently have any callers that don't know their file count) |
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724 if expectedcount > 0 and expectedcount < minfilecount: |
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725 return |
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726 |
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727 maxqueue = ui.configint(b'worker', b'backgroundclosemaxqueue') |
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728 threadcount = ui.configint(b'worker', b'backgroundclosethreadcount') |
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729 |
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730 ui.debug( |
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731 b'starting %d threads for background file closing\n' % threadcount |
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732 ) |
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733 |
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734 self._queue = pycompat.queue.Queue(maxsize=maxqueue) |
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735 self._running = True |
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736 |
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737 for i in range(threadcount): |
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738 t = threading.Thread(target=self._worker, name='backgroundcloser') |
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739 self._threads.append(t) |
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740 t.start() |
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741 |
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742 def __enter__(self): |
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743 self._entered = True |
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744 return self |
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745 |
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746 def __exit__(self, exc_type, exc_value, exc_tb): |
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747 self._running = False |
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748 |
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749 # Wait for threads to finish closing so open files don't linger for |
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750 # longer than lifetime of context manager. |
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751 for t in self._threads: |
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752 t.join() |
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753 |
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754 def _worker(self): |
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755 """Main routine for worker thread.""" |
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756 while True: |
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757 try: |
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758 fh = self._queue.get(block=True, timeout=0.100) |
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759 # Need to catch or the thread will terminate and |
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760 # we could orphan file descriptors. |
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761 try: |
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762 fh.close() |
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763 except Exception as e: |
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764 # Stash so can re-raise from main thread later. |
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765 self._threadexception = e |
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766 except pycompat.queue.Empty: |
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767 if not self._running: |
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768 break |
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769 |
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770 def close(self, fh): |
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771 """Schedule a file for closing.""" |
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772 if not self._entered: |
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773 raise error.Abort( |
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774 _(b'can only call close() when context manager active') |
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775 ) |
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776 |
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777 # If a background thread encountered an exception, raise now so we fail |
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778 # fast. Otherwise we may potentially go on for minutes until the error |
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779 # is acted on. |
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780 if self._threadexception: |
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781 e = self._threadexception |
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782 self._threadexception = None |
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|
783 raise e |
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|
784 |
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|
785 # If we're not actively running, close synchronously. |
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786 if not self._running: |
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|
787 fh.close() |
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788 return |
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789 |
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790 self._queue.put(fh, block=True, timeout=None) |
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791 |
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792 |
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793 class checkambigatclosing(closewrapbase): |
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794 """Proxy for a file object, to avoid ambiguity of file stat |
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795 |
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796 See also util.filestat for detail about "ambiguity of file stat". |
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797 |
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798 This proxy is useful only if the target file is guarded by any |
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799 lock (e.g. repo.lock or repo.wlock) |
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800 |
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801 Do not instantiate outside of the vfs layer. |
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802 """ |
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803 |
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804 def __init__(self, fh): |
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805 super(checkambigatclosing, self).__init__(fh) |
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806 object.__setattr__(self, '_oldstat', util.filestat.frompath(fh.name)) |
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807 |
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808 def _checkambig(self): |
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809 oldstat = self._oldstat |
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810 if oldstat.stat: |
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811 _avoidambig(self._origfh.name, oldstat) |
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812 |
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813 def __exit__(self, exc_type, exc_value, exc_tb): |
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814 self._origfh.__exit__(exc_type, exc_value, exc_tb) |
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815 self._checkambig() |
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816 |
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817 def close(self): |
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818 self._origfh.close() |
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819 self._checkambig() |